Sabish students work to lessen carbon impact on planet - Fond du Lac Reporter

Sabish students work to lessen carbon impact on planet Fond du Lac Reporter The best computer, in terms of energy efficiency, according to the team, was the iPad2, which uses 4.69 watts an hour and emits only 1.33 pounds of CO2. It beat out its closest competitors (in consumption), the iPad1 and the Amazon Kindle Fire.